Straightway valve.



Patented Sept. 23, |902.

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(Application sued Nev. 16. 1901.)

(No Mo'del.)

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ATTORNEY WITNESSES:

y UNTTED STATES PATENT OEETCE,

DANIEL KENNEDY, OE BROOKLYN, NEV YORK.

STRAIG HTWAY VALVE.

SPECIFICATION formingpart of Letters Patent No. 709,491, dated September23, 1902.

Application led November 16, 1901. Serial No. 82,501. (No model.)

To 1f/ZL whom t may concern:

Beit known thatLDANIEL KENNEDY, a citizen of the United States, residingin the borough of Brooklyn, in the cityand State of New York, haveinvented a certain new and useful Improvement in Straightway Valves, ofwhich the following is a specification.

The invention applies to that class of valves in which the control ofthefluid is effected by two disks mounted wedgewise back to back and movedby the mechanism into position between corresponding wedgewise surfaceswhich form, in effect, the adjacent ends of the fixed pipes. It iscommon to provide for a small amount of rocking of these disks tocompensate for inequalities in the Obliquity or for the engagement of achip or other solid matter which may require either of the disks to tilton its bearing. I can employ any ordinary or suitable means to move thepair of disks thus united out from their central position in the line ofthe pipes and back again, as required to open and close the valve.

The improvement relates to the disks and adjacent bearing and rubbingsurfaces. It has long been common to provide separatelyformedfacing-rings for each disk, which may be of a different metal, as brass,while the main body of the valve is iron. It has been proposed to engagethem by causing the rings to lock by spreading in undercut grooves. Ihave discovered an improved,V form which greatly improves the effect byinducing the spreading effect at the bottom only of the groove. Thiswith little labor or skill preserves the integrity ofthe metal both ofthe ring and the grooved iron and holds these facing-rings with unusualtightness and {irmness. I'also provide for receiving the pressurereceived through these rings through the Wedging action impelled by thestrong screw force, in shutting and also for receiving the force,sometimes very great, exerted by the fluid on a large valve. I willrefer to the fluid as water; but it will be understood that theinvention may apply with steam, air, or any other liquid or gasrequiring to be tightly stopped and to be easily freed, partly or entirely, at will.

The following is a description of what I consider the best means ofcarrying out the invention.

The accompanying drawings form a part of this specification.

Figure l is a central vertical section in the plane of the axis of thepipes. Fig. 2 is in fthe right half a corresponding section in a planeat right angles to that of Fig. l. The left half shows the outer orfront face of the other disk in elevation. Fig. 3 is a plan view with ahorizontal section of the interior parts 0n the line 3 3 in Fig. 2.Figs. tand 5 show a section through the facing-ring and the adjacentportion of a valve on a larger scale. They are in a plane correspondingto Fig. l and show different stages of the construction, as follows:Fig. a is a section as these parts are constructed and presented to eachother in the act of joining, and Fig. 5 shows the same parts after theyhave been united by forcibly compressing together. Fig. lL is a sideelevation of the rolling-ring detached in the position shown in Fig. l.Eig. 2at is a side elevation of the rolling-ring detached in theposition shown in Fig. 2. The left side of Fig. 3a is a plan View ofhalf of the rollingring detached in the position shown in Fig. 3, andthe right side is a horizontal section of the other half. Fig. (5 is ahorizontal section corresponding to Eig. 3, but showing a modi fication.

Similar letters of reference indicate correspending parts in all thefigures where they appear. Y

A is the main body of the casing, and A A' are removable annular piecesset inclined in opposite directions and finished to serve asvalve-seats.

B is the operating-screw, having a collar B, carried in a suitable toppiece, which forms an enlargement of the chamber, into which the valvemay be drawn and retained when desired. The operating-screw is equippedwith a stuffing-box and hand-wheel.

So far as yet described all may be of an ordinary and long-approvedconstruction.

D and D are disks separately formed and capable of tilting to a smallextent, Each is recessed to strongly but loosely take hold of the flangeO/ of a nut C, engaged with the screw B, and by the turning of whichscrew the disks are moved to open and close the passage. The workingside of each disk is faced with a ring E, of soft brass, cast with ICOtwo annular ridges E E2, each of V-shaped section. When this ring iscast, these ridges have their outer sides parallel, the obliquity beingall on their inner sides, as indicated in Fig. 4. Each disk D is formedwith an annular groove only sufficiently wide at the surface to receivethe two ridges E E2 while in sented and forced into position, preferablyby hammering with an air-hammer. The beveled inner faces of the ridges EE2 striking the rounded bottom d2 are spread apart, and the force beingcontinued drives the metal home, engaging it smoothly with the undercutedges d cl2 of the groove, so that it is strongly locked at the bottomof the V-shaped groove, while by reason of the rounding of the ridge atthe center, with the cross-section of the softer ring not so rounded,the metal of the ring is but slightly, if at all, compressed, and thestronger iron receives the locking spread of the annular ridges at thebase of the grooves alone, where it is able to withstand it withoutdanger of cracking or weakening. Plane extensions D2, which I will termguide-lugs, on the edges of each disk D travel within guide-anges A2,cast on the interior of the casing A, which insure against the disksbecoming much separated and against the plane of travel of the disksbecoming changed.

I provide for receiving the pressure of the disks D D on largesurfaces., with adequate provision for rocking in any direction to thegreatest extent ever required. The central portion of the back of eachdisk is recessed, as indicated by d, (see Figs. l and 3;) but thisrecess does not receive the load. It is simply to provide Vfor looselyreceiving the ring to be presently described. The pressure, very greatwith large valves, is received with liberty to rock on lenticular-shapedbearing parts G' G', of hard brass or other suitable material, eachthicker at its inner than at its outer edge and received betweencorrespondingly inclined and concaved faces on the ends of posts D',which extend from the back of each disk. The bearings G' l are heldfirmly apart by means o f a thin but sufficiently stout connecting-ringG, cast integral therewith. The bearing and rolling surfaces are eachportions of a large sphere. I have succeeded well by making thesesurfaces each a portion of a sphere having a radius exactly coincidingwith that of the disks, but this may be varied. The construction allowsthat the bearings shall be, respectively, portions of large spheres, andyet requires the disks to be held only a small distance apart,

little more than sufficient to allow the ating-screw to be received.

It is common to provide separately-formed facing-rings; but the meansfor securing each to its respective disk have been expensive andimperfect. My form of locking carried out with as uficiently yieldingmetal, as soft brass, attaches such facing reliably, tightly, andcheaply and without overstraining the metal. It has long been practicedto hold such disks apart with liberty to rock by mechanism between thebacks. The provisions for this heretofore employed have been defective,some in encumbering the central portion ot' the space, so that thechoice of operating means is limited, because the operatingscrew cannotbe allowed to pass the center. None can present so large a surface asmine to receive the pressure. My invention provides for rocking freelyin all directions and for leaving a clear space for an operatingscrew tobe received through the center between the disks. My experimentsindicate that the surfaces will remain in good condition for anindefinite period.

Modications may be made Without departing from the principle orsacrificing the advantages of the invention. The areas, as well as thesphericity, of the lenticular bearing partsG and of the correspondingreceivingsurfaces on the posts D may be less or even somewhat greaterthan shown. The beveling or undercutting of the edges d d2 of the groovemay be considerably less than shown. The great force applied to theparts in working is always in the direction pressing the ring home,never rending it. The whole construction is economical and durable andgreatly reduces the liability of the metal on either the outer or innerfaces of the disk to become crushed or abraded.

A modification which is important on some accounts is indicated in thehorizontal section in Fig. 6. In this the bearing-surfaces provided bythe lenticular bearing portions are concave rather than convex, and theposts which are cast on the backs of the disks are correspondinglyconvex. This form, though widely different in appearance, will allow thedisks to rock, While insuring their being carried up and down by thescrew in the same manner as the other and preferred form.

I claim as my inventionl. In a valve having inclined seats, disks withinclined outer faces and an operatingscrew which is received between thedisks, and posts D' D' in the backs having concave bearing-facesarranged on each side respectively of the operating-screw, thecombination therewith of two lenticular bearingpieces G G matching inthe concave seats on such posts, all adapted to serve substantially asherein specified.

2. In a valve having inclined seats, disks with inclined outer faces anoperating-screw which is received between the disks, and posts oper- IOOIIO

DANIEL KENNEDY.

faces arranged on each side respectively of the operating-screw, thecombination therewith of two lenticular bearing-pieces matching in theconcave seats on such posts, and a ring G connectingr suchbearing-pieces adapted to hold such bearing-pieces apart, all arrangedto serve substantially as herein speci- D D' in the backs having concavebearingl l l i iied.

8. A stop-valve provided with a ring ar- Witnesses: ranged between thedisks and having two leul J. B. CLAUTICE, ticular bearing-piecesintegral therewith and 1 M. F. BOYLE.

